Re: Outlook 2016 plugin will not install: Certificate not trusted

@damian79 In some rare cases where the Windows environment is up to date (VSTO + .NET), users have reinstalled Outlook in order to create a fresh version for the GoToMeeting plugin to connect with. I don't know that this is the best solution for you, but you are also welcome to call directly into support so that we may document your environment a little better to see where the confusion rests.

Re: Outlook 2016 plugin will not install: Certificate not trusted

If you have tried everything on this thread and the prerequisites and adding all the related exceptions listed here, and the CLI file, it's probably best to create a case directly with Customer Support.